I'm seeing some oddity with the latest fedora development kernel and a usbserial device.
2.6.20-1.2949.fc7 #1 SMP Mon Feb 26 18:33:03 EST 2007 x86_64 x86_64
x86_64 GNU/Linux
Its a evdo device.
Doing:
modprobe usbserial vendor=0x413c product=0x8128 debug=1
gets:
drivers/usb/serial/usb-serial.c: Had to override the open usb serial operation
with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the write usb serial operation
with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the close usb serial operation
with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the write_room usb serial
operation with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the chars_in_buffer usb serial
operation with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the read_bulk_callback usb
serial operation with the generic one.
drivers/usb/serial/usb-serial.c: Had to override the write_bulk_callback usb
serial operation with the generic one.
drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
drivers/usb/serial/usb-serial.c: static descriptor matches
drivers/usb/serial/usb-serial.c: found interrupt in on endpoint 0
drivers/usb/serial/usb-serial.c: found bulk in on endpoint 1
drivers/usb/serial/usb-serial.c: found bulk out on endpoint 2
usbserial_generic 1-2.2:1.0: generic converter detected
drivers/usb/serial/usb-serial.c: usb_serial_probe - setting up 1 port
structures for this device
drivers/usb/serial/usb-serial.c: the device claims to support interrupt in
transfers, but read_int_callback is not defined
drivers/usb/serial/usb-serial.c: get_free_serial 1
drivers/usb/serial/usb-serial.c: get_free_serial - minor base = 0
drivers/usb/serial/usb-serial.c: usb_serial_probe - registering ttyUSB255
Attempt to register invalid tty line number (255).
usb 1-2.2: generic converter now attached to ttyUSB255
drivers/usb/serial/usb-serial.c: static descriptor matches
drivers/usb/serial/usb-serial.c: found bulk in on endpoint 0
drivers/usb/serial/usb-serial.c: found bulk out on endpoint 1
usbserial_generic 1-2.2:1.1: generic converter detected
drivers/usb/serial/usb-serial.c: usb_serial_probe - setting up 1 port
structures for this device
drivers/usb/serial/usb-serial.c: get_free_serial 1
drivers/usb/serial/usb-serial.c: get_free_serial - minor base = 1
drivers/usb/serial/usb-serial.c: usb_serial_probe - registering ttyUSB255
usb-serial ttyUSB255: Error registering port device, continuing
usbcore: registered new interface driver usbserial_generic
drivers/usb/serial/usb-serial.c: USB Serial Driver core
usbcore: deregistering interface driver usbserial_generic
drivers/usb/serial/usb-serial.c: usb_serial_disconnect
drivers/usb/serial/usb-serial.c: destroy_serial - generic
drivers/usb/serial/generic.c: usb_serial_generic_shutdown
drivers/usb/serial/generic.c: generic_cleanup - port 255
drivers/usb/serial/usb-serial.c: return_serial
On a updated fc6 kernel it works fine and gives me a ttyUSB0, ttyUSB1.
Trying to rmmod the module gets:
Unable to handle kernel NULL pointer dereference at 0000000000000048 RIP:
[<ffffffff80466693>] klist_del+0x16/0x50
PGD 626f0067 PUD 601bc067 PMD 0
Oops: 0000 [1] SMP
last sysfs file: /class/net/eth0/carrier
CPU 1
Modules linked in: usbserial kvm_intel kvm i915 drm autofs4 hidp rfcomm l2cap
sunrpc nf_conntrack_netbios_ns ipt_REJECT nf_conntrack_ipv4 xt_state
nf_conntrack nfnetlink xt_tcpudp iptable_filter ip_tables x_tables acpi_cpufreq
dm_multipath video sbs i2c_ec button bay dock battery asus_acpi ac ipv6
parport_pc lp parport aes cbc blkcipher sha256 dm_crypt snd_hda_intel
snd_hda_codec snd_seq_dummy hci_usb bluetooth snd_seq_oss snd_seq_midi_event
rtc_cmos fw_ohci snd_seq tg3 rtc_core fw_core serio_raw snd_seq_device rtc_lib
snd_pcm_oss iTCO_wdt iTCO_vendor_support snd_mixer_oss snd_pcm snd_timer snd
soundcore shpchp i2c_i801 snd_page_alloc i2c_core sr_mod cdrom sg joydev
dm_snapshot dm_zero dm_mirror dm_mod ata_piix ata_generic libata sd_mod
scsi_mod ext3 jbd mbcache ehci_hcd ohci_hcd uhci_hcd
Pid: 3256, comm: rmmod Not tainted 2.6.20-1.2949.fc7 #1
RIP: 0010:[<ffffffff80466693>] [<ffffffff80466693>] klist_del+0x16/0x50
RSP: 0018:ffff8100606d1c88 EFLAGS: 00010296
RAX: ffff8100760cf2b8 RBX: 0000000000000000 RCX: 0000000000000001
RDX: ffff81004f4c6778 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8100606d1ca8 R08: 000000000000022a R09: 0000000000000001
R10: ffffffff884479d2 R11: 0000003000000018 R12: ffff8100760cf4a8
R13: ffff81004f4c6768 R14: ffff81007e386710 R15: ffff81007e386710
FS: 00002aaaab0136f0(0000) GS:ffff810003f5fcc0(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000048 CR3: 000000005e918000 CR4: 00000000000026e0
Process rmmod (pid: 3256, threadinfo ffff8100606d0000, task ffff810065365080)
Stack: 0000000000000001 ffff8100760cf458 ffff8100760cf458 ffff81004f4c6768
ffff8100606d1cd8 ffffffff803b7d60 ffff8100760cf458 ffff81004f4c6768
ffff81004f4c6768 0000000000000000 ffff8100606d1cf8 ffffffff803b7f6f
Call Trace:
[<ffffffff803b7d60>] device_del+0x23/0x221
[<ffffffff803b7f6f>] device_unregister+0x11/0x1e
[<ffffffff88447d83>] :usbserial:destroy_serial+0x9a/0xf7
[<ffffffff88447ce9>] :usbserial:destroy_serial+0x0/0xf7
[<ffffffff80235ce2>] kref_put+0x71/0x7d
[<ffffffff88447b4a>] :usbserial:usb_serial_put+0x14/0x16
[<ffffffff88447be1>] :usbserial:usb_serial_disconnect+0x95/0xc1
[<ffffffff803d3dc2>] usb_unbind_interface+0x47/0x87
[<ffffffff803ba2a3>] __device_release_driver+0x93/0xb3
[<ffffffff803ba8a4>] driver_detach+0xdb/0x11d
[<ffffffff803b9dc1>] bus_remove_driver+0x75/0x98
[<ffffffff803ba921>] driver_unregister+0x15/0x21
[<ffffffff803d3746>] usb_deregister+0x9a/0xa8
[<ffffffff884499c3>] :usbserial:usb_serial_generic_deregister+0x10/0x1e
[<ffffffff8844a2dd>] :usbserial:usb_serial_exit+0x9/0x3b
[<ffffffff802aa22d>] delete_module+0x15a/0x188
[<ffffffff802aa2af>] sys_delete_module+0x54/0x65
[<ffffffff802636ff>] trace_hardirqs_on_thunk+0x35/0x37
[<ffffffff80222902>] __up_read+0x1a/0x83
[<ffffffff8025c11e>] system_call+0x7e/0x83
Code: 4c 8b 6b 48 e8 ac d5 df ff 4c 89 e7 e8 39 ff ff ff 85 c0 74
RIP [<ffffffff80466693>] klist_del+0x16/0x50
RSP <ffff8100606d1c88>
CR2: 0000000000000048
lsusb -v on the device:
Bus 001 Device 005: ID 413c:8128 Dell Computer Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x413c Dell Computer Corp.
idProduct 0x8128
bcdDevice 0.00
iManufacturer 1 Novatel Wireless Inc.
iProduct 2 Novatel Wireless EXPD CDMA
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 62
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 3 Data Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 128
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 3 Data Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Happy to provide more info, or file a bug in the fedora bugzilla if it
looks like thats a good idea.
kevin
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